“Floods are not always a hazard. They may also sustain aquatic life and riverine biodiversity, recharge aquifers, enrich soilds and in some of the world's poorest areas they are the main source of irrigation.” -- Global Water Partnership (2000) 'Toward water security: a framework for action
Spate irrigation is the art and science of managing floods for irrigation. It is unique to arid and semi-arid environments, found in the Middle East, North Africa, West Asia, East Africa and parts of Latin America.